Dr. Mark A. Lewis received his medical degree, completed his internal medicine residency, and served as chief resident at Baylor College of Medicine in Houston, Texas. After completing a hematology/oncology fellowship at the Mayo Clinic in Rochester, Minnesota, where he served as chief fellow, he returned to Houston to work at the MD Anderson Cancer Center for four years, with a dual appointment in general and gastrointestinal medical oncology, before assuming the directorship of gastrointestinal oncology at Intermountain Healthcare in Salt Lake City, UT, USA in 2016.

Dr Mark Lewis has received financial support/sponsorship for research support, consultation, or speaker fees from the following companies:

Natera, Astellas, Pfizer, AstraZeneca, Medscape